/**
 * Copyright (c) 2009 Jim Hurne
 * 
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without
 * restriction, including without limitation the rights to use,
 * copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following
 * conditions:
 * 
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */
package org.tzconverter.test.util;

import java.util.EventListener;
import java.util.List;

import org.unitils.mock.mockbehavior.MockBehavior;
import org.unitils.mock.proxy.ProxyInvocation;

/**
 * Mock behavior that captures an event listener.  The arguments that 
 * are passed to the mocked method are checked in order for an EventListener.
 * Once one is found, that event listener is saved, and no other arguments
 * are evaluated.
 * 
 * 
 * @since May 12, 2009
 */

public class ListenerCollector<T extends EventListener> implements MockBehavior
{
  private T listener;

  /* (non-Javadoc)
   * @see org.unitils.mock.mockbehavior.MockBehavior#execute(org.unitils.mock.proxy.ProxyInvocation)
   */
  @SuppressWarnings("unchecked")
  public Object execute(ProxyInvocation proxyInvocation) throws Throwable
  {
    List<Object> arguments = proxyInvocation.getArguments();
    for(Object arg : arguments)
    {
      if(arg instanceof EventListener)
      {
        listener = (T) arg;
        return null;
      }
    }
    return null;
  }

  public T getListener()
  {
    return listener;
  }
}
